chore(deps): bump next from 15.5.20 to 15.5.23

[dependabot]

Bumps next from 15.5.20 to 15.5.23.

Release notes

Sourced from next's releases.

v15.5.23

What's Changed

• [15.x] Port ReplyServer traversal guards to FlightClient @​eps1lon in vercel/next.js#96405

Full Changelog: vercel/next.js@v15.5.22...v15.5.23

v15.5.22

What's Changed

• [15.5] Reject TypeScript >= 7.0 with an actionable error by @​lukesandberg in vercel/next.js#96110

Full Changelog: vercel/next.js@v15.5.21...v15.5.22

v15.5.21

This release contains security fixes for the following advisories:

High:

• Denial of Service in App Router using Server Actions
• Middleware / Proxy bypass in App Router applications using Turbopack and single locale
• Server-Side Request Forgery in rewrites via attacker-controlled destination hostname
• Server-Side Request Forgery in Server Actions on custom servers

Moderate:

• Cache confusion of response bodies for requests with bodies
• Cache confusion of response bodies for requests with bodies containing invalid UTF-8 byte sequences
• Denial of Service in the Image Optimization API using SVGs
• Unauthenticated disclosure of internal Server Function endpoints
• Unbounded Server Action payload in Edge runtime

Commits

• c91fd53 v15.5.23
• 0cb3208 [15.x] Port ReplyServer traversal guards to FlightClient (#96405)
• 6ad9e56 v15.5.22
• fcc0424 [15.5] Reject TypeScript >= 7.0 with an actionable error (#96110)
• e26f6ff v15.5.21
• 7f5deeb [15.x] Improve performance of checking valid MPA form submissions
• 57c31f7 [15.x] Enforce serverActions.bodySizeLimit for Server Actions in Edge runtime
• e3e5666 [15.x] Set correct origin for internal redirects in custom server
• 35f5013 [15.x] Ensure exotic rewrite param values are properly encoded
• 062f667 [15.x] fix(fetch-cache): key fetch(Request, init) by the effective request
• Additional commits viewable in compare view

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Summary by cubic

Upgrades next from 15.5.20 to 15.5.23 to pick up security fixes and stability hardening. Builds that used to run on TypeScript 7+ will now fail with an actionable error; keep TypeScript < 7 to avoid breakage.

• Applies upstream fixes affecting Server Actions (incl. Edge runtime payload limits), middleware with Turbopack and single locale, rewrites to external hosts (SSRF and param encoding), and SVG image optimization DoS protections.
• Required: keep typescript < 7.0.0.
• Validate dev/prod builds and smoke‑test: Server Actions, middleware/proxy routes, rewrites, and SVG image optimization; if using a custom server, verify internal redirects.
• No app code changes; lockfile updates reflect dependency graph changes only.

^{Written for commit fe6f16a. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
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